Oil filter



FIG. 1 is a top perspective view of the oil filter;

FIG. 2 is another top perspective view, partially cut-away to show the visible interior features thereof;

FIG. 3 is a top view thereof, the bottom view being substantially identical; and,

FIG. 4. is front view thereof, the left, right and rear views being substantially identical.

The oil filter is shown broken away in FIGS. 1, 2 and 4 to indicate the design has no specific length.

References to “side”, “top”, “front” and “bottom” in the figure descriptions are not meant to require certain in-use orientation; an oil filter according to the claimed design may be used in any orientation. 

CLAIM The ornamental design for an oil filter, as shown and described. 